carsluTT

could anyone tell me what the ring and pinion ratio is on the rear diff in a quattro tt? is there more than 1 ratio? im out of town and dont have my bently to look all this joy up on right now.

thanks

GeTT da NeTT

I'm pretty sure it's the same as the front.

carsluTT

oh i hope they are, whats the front diff ring and pinion ratio then? ahahha..

TTschwing

Type: Front wheel drive quattro all-wheel drive
Transmission: 5-speed manual transmission 6-speed manual transmission
Gear Ratios:
1st 3.300:1
2nd 1.944:1
3rd 1.308:1
4th 1.034:1
5th 0.838:1
reverse 3.060:1
Final Drive 3.938:1

1st 3.417:1
2nd 2.105:1
3rd 1.429:1
4th 1.088:1
5th 0.970:1
6th 0.912:1
Reverse 4.107:1
Final 3.316:1

Audiboy

It's like

tranny to front final drive,

front final drive to "intermediate shaft" whatever it's called.
"intermediate shaft" to front axles

intermediate shaft to front small pinion and ring

front small pinion to (haldex to) rear small pinion

rear small pinion and ring to rear axles

Easier to draw it I guess.

J. Patterson

Certainly possible given that it is driven by the ring gear of the front Diff. Would seem kind of odd to make it a different ratio though requireing a complemetary ratio at the rear that achieved an identical overall ratio.

Audiboy

Then they just hook up some gearing to attach the "front shaft" to the rear shaft.

If you are to change final gearing, only the diff inside the tranny (transaxle) needs to be changed. No need for the rear.

Let me find a picture of what I mean...

Audiboy

See the gears around 6,7? That's the final drive

The gears around 10 and 11 is what connects a front wheel drive to the rear drive unit. The rear drive will have the same ratio as 10 and 11.<ul><li><a href="https://forums.audiworld.com/tt/msgs/1452396.phtml">front transaxle flat view</a></li></ul>

J. Patterson

Changing the ratio on the front would thus change the rear ratio also, since the rear simply mimics the front ratio. Got it.

Audiboy

yup. ingenious engineering I would say